Audi A4 / S4 (8E/8H; 2005-2008) fuses

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In this article, we consider the third-generation Audi A4 / S4 (B7/8E/8H), produced from 2004 to 2008. Here you will find fuse box diagrams of Audi A4 and S4 2004, 2005, 2006, 2007, and 2008, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout).

Fuse Layout Audi A4/S4 2005-2008

Audi A4 / S4 (8E/8H; 2005-2008)

Component Location

  1. Main fuse
  2. Connector station – Right A-pillar
  3. Connector station – RF seat wiring
  4. Relay panel (9-position) at Vehicle Electrical System Control Module
  5. Relay panel (4-position) with threaded connection
  6. Connector station – LF seat wiring
  7. Fuse panel
  8. Connector station – Left A-pillar
  9. Connector station with threaded connection
  10. Relay panel (4-position)

Instrument Panel Fuse Box

Fuse Box Location

The fuses are behind a cover on the driver’s side. Carefully pry the face cover off the instrument panel using the ignition key or a screwdriver.Location of the fuses in the passenger compartment: Audi A4 (B7; 2004-2008)

Fuse Box Diagram

Instrument panel fuse box diagram: Audi A4 (B7; 2004, 2005, 2006, 2007, 2008)

Assignment of the fuses in the instrument panel
AmpsFunction/Component
110AClimatronic Control Module
25ALeft Footwell Light
Right Footwell Light
35ALeft Washer Nozzle Heater
Right Washer Nozzle Heater
Left Rear Footwell Light
Right Rear Footwell Light
45ACoolant Fan Control (FC) Control Module
Coolant Fan Control (FC) Control Module 2
510ARear Window Shade Switch
Function Selector Switch II
Tiptronic Switch
Oil Level Thermal Sensor
Rear Window Shade Control Module
Navigation System with CD Drive Control Module
Parking Aid Control Module
65AHigh Pressure Sensor
Sensor for air quality
710AAnti-Slip Control Switch
Clutch Pedal Switch
Brake Pedal Switch
ABS Control Module
85ATelephone Transceiver
Telephone Amplifier
915ABrake Booster Relay
105AHeadlamp Adjuster
Headlamp Range Control Module
Headlamp Range/Comering Lamp Control Module
Left Headlamp Beam Adjusting Motor
Right Headlamp Beam Adjusting Motor
Right Dynamic Cornering Light Motor
115AAirbag Control Module
Warning Lamp for airbag off, passenger side
1210A16 pin connector, black, diagnostic connector
1310ASteering Column Electronic Systems Control Module
1410ABrake Light Switch
1510AInstrument Cluster Control Module
Navigation System with CD Drive Control Module
165AGarage Door Opener Control Head
Garage Door Opener Control Module
1710ARain/Light Recognition Sensor
Parking Aid Control Module
Tire Pressure Monitoring Control Module
185ALeft Dynamic Cornering Light Motor
1910ALeft Lront Fog Lamp
Right Front Fog Lamp
20-Not used
21-Not used
2215ADrivers Door Control Module
Front Passenger's Door Control Module
2315ALeft Rear Door Control Module
Right Rear Door Control Module
2420AComfort System Central Control Module
2530AFresh Air Blower Control Module
2630ARear Window Defogger Relay
2730ATowing Recognition Control Module
2820ATransfer Fuel Pump (FP)
Fuel Pump (FP) Control Module
29-Not used
3020APower Sunroof Control Module
3115ABack-Up Light Switch
Mass Air Flow (MAF) Sensor
Light Recognition Sensor
Starting Interlock Relay
Transmission Control Module (ICM)
3215ATrailer Socket
3315A/20ACigarette lighter
3420A/30A12V Socket
3520A/30ASocket
3630AVehicle Electrical System Control Module
Rear Window Wiper Motor
3730AVehicle Electrical System Control Module
Headlamp Washer Pump
3815ARadar Interior Monitoring Control Module 1
Alarm Horn
Comfort System Central Control Module
8 pin Connector, black, radio connector III
3920ARadio
Amplifier
4025AHigh Tone Horn
Low Tone Horn
Horn Relay
4130AAuxiliary Heater Control Module
Auxiliary Heater Radio Receiver
4225AABS Control Module
4315AEngine Timing
Mass Air Flow (MAF) Sensor
EGR Potentiometer
SIMOS Control Module Power Supply Relay
Engine Control Module (ECM)
Engine Component Power Supply Relay
EGR Vacuum Regulator Solenoid Valve
4430AClimatronic Control Module
Connector station – Right A-pillar

Connector station - Right A-pillar: Audi A4 (B7; 2004, 2005, 2006, 2007, 2008)

AmpsCircuit Protected
E30APower Seat (with manual seats with power lumbar)
E10APower Seat (with power seats)

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Relay Panels

The relay panels are located behind instrument panel, driver’s side.

Relay panel (4-position) with threaded connection

Relay panel (4-position): Audi A4 (B7; 2004, 2005, 2006, 2007, 2008)

Amp RatingCircuit Protected
F10A/40A/60AFuse (Driver Fan training vehicle) (Not for Engine code BBK, BHF)
Coolant Fan Fuse (Engine code BBK, BHF, BNS, BKN)
G30A/40A/60ARadiator After run Fuse (Engine code BBK, BHF, BNS, BKN)
Coolant Fan Fuse (Not for Engine code BKN, BBK, BHF)
H40AABS Control Module Fuse 1
3NG Engine Throttle Relay 1 (not applicable to USA/CDN models)
4NG Engine Throttle Relay 2 (not applicable to USA/CDN models)
4Alarm - On/Hands-free Control Module (not applicable to USA/CDN models)
Relay panel (9-position)

Relay panel (9-position): Audi A4 (B7; 2004, 2005, 2006, 2007, 2008)

AmpsCircuit Protected
A10ARear Shade Circuit Breaker (Right)
B10ARear Shade Circuit Breaker (Left)
D30APower Windows Fuse 2
E10ADriver's Power Seat Adjustment Circuit Breaker 2
E10ADriver's Power Seat Adjustment Circuit Breaker 2 (Lumbar Support Adjustment)
F30APower Windows Fuse
G30ATrailer Circuit Breaker
1Fuel Pump (FP) Relay
2Servotronic Control Module
3Starter Relay 2 (For engine code AUK, BKH, BNS)
4Starter Relay 2 (For engine code AUK, BKH, BNS)
Brake Booster Relay (Not applicable for engine code AUK, BKH)
5Rear Window Defogger Relay
6Load Reduction Relay
8Horn Relay
4Brake Booster Relay (Not applicable for engine code AUK, BKH)

Main Fuse

The main fuse is located on the battery positive post, the fuse is numbered “S88” and has an amperage rating of 150 amps. The battery is located in the plenum chamber on right side of engine compartment.Main Fuse: Audi A4 (B7; 2004, 2005, 2006, 2007, 2008)


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